package StringBuilder_note;

public class StringBuilder1 {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();
        sb.append("wo de fack");
        sb.append(12);//添加元素
        sb.reverse();//反转==
        sb.reverse();
        System.out.println(sb.length());
        String str = sb.toString();//转换类型

        System.out.println(sb);

    }
}
